• Behaviour
• Function
• Relationship between inputs and outputs of an entity
Syntax
• Architecture can contain only concurrent statements.
• A design can be described in an architecture using various levels of abstraction.
• An entity can have more than one architectures since a function can be implemented in a number of ways.
• There can be no architecture without an entity.
Architectural bodies
• Behavioural
– It is the high-level description.
– It contains a set of assignment statements to represent behaviour.
– No need to focus on the gate-level implementation of a design.
• Dataflow
–It uses concurrent signal assignment statements.
• Structural
– Components from libraries are connected together.
– Designs are hierarchical.
– each component can be individually simulated.
– it makes use of component instantiation.
Configuration
• Since a number of architectures can exist for an entity , using configuration statement we can bind a particular architecture to the entity.
Syntax
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